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  • MESO: Mesoscale Discussion 0691

    From COD Weather Processor@1:2320/105 to wx-storm@lists.illinois.edu on Sunday, June 10, 2018 04:45:24
    This is a multi-part message in MIME format...

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    ACUS11 KWNS 100445
    SWOMCD
    SPC MCD 100444
    ILZ000-WIZ000-IAZ000-100645-

    Mesoscale Discussion 0691
    NWS Storm Prediction Center Norman OK
    1144 PM CDT Sat Jun 09 2018

    Areas affected...parts of eastern Iowa...southwest Wisconsin...and
    northwest Illinois

    Concerning...Severe Thunderstorm Watch 167...

    Valid 100444Z - 100645Z

    The severe weather threat for Severe Thunderstorm Watch 167
    continues.

    SUMMARY...Local risk for damaging winds, and some potential for hail
    up to an inch in diameter, continues in/near WW 167.

    DISCUSSION...Latest radar loop shows an increasingly
    organized/bowing band of storms crossing east-central Iowa at this
    time, which continues moving east-southeastward. While the greatest instability remains to the southwest of the ongoing cluster (hence
    the tendency for backbuilding updraft development), a secondary axis
    of mixed-layer CAPE near or below 1000 J/kg extends southeastward
    along the warm frontal zone -- roughly demarcated by a developing
    band of convection extending from the main/bowing band of storms
    into north central Illinois.

    Expect the MCS to continue advancing east-southeast over the next
    couple of hours, fueled by the aforementioned instability axis, and
    aided with respect to organization by enhanced (35-45 kt) flow
    centered near the 700 mb layer per area VWPs. With surface
    dewpoints near 70 along the boundary, suggestive of only a rather
    weakly stable boundary layer, potential for gusty/locally damaging
    winds persists, and should linger for at least another couple of
    hours.

    ..Goss.. 06/10/2018

    ...Please see www.spc.noaa.gov for graphic product...

    ATTN...WFO...LOT...ILX...MKX...DVN...ARX...DMX...

    LAT...LON 41719294 42089209 42259123 43119054 42448881 41438876
    41108907 41159064 41459234 41719294



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